A Handweaver's Pattern Book, Revised Edition, by Marguerite Davison (HC, 1977, self published, $8, which is 1/3 the internet price)
"A Handweaver's Pattern Book is devoted solely to four-harness patterns which may be made by threading the warp through the heddles and developing them through treadle manipulation and tie-up of the harnesses. The pattern selection gives a wide variety of material for all types of weaving, whether professional or amateur... Many of the patterns are original; the others come from many sources. Some are particular pets of contemporary weavers, have been developed from manuscript notes of former weavers, or are combined from several fundamental units." That all sounds cool, whatever it means. Probably it does make sense if you are a weaver.
Look for this book on the new non-fiction table.